I have a F150 (2006 King Ranch) that came with 20". One thing i do know is if you want to keep the same rubber but only replace the rims, you will have to find rims of equivilent size and offset. The offset is quite important becuase this is the offset to where the centerline of the hub is located. If the offset is not matched up properly, then your wheels with either stick out or be inset too much causing other potential problems. Also you will have to match up the hub hole pattern.

It looks like your 150 has 20" rims/tires. If you go with the Gear Wheels you will need to go with the 20x9 however not sure your stock tire will work... the stock tire (P275/55R20 111S) is made for a much narrower rim like 8". I would place a call to Gear -American Tire Distributor to validate recommended tire size for their 20x9 wheels...

It looks like your 150 has 20" rims/tires. If you go with the Gear Wheels you will need to go with the 20x9 however not sure your stock tire will work... the stock tire (P275/55R20 111S) is made for a much narrower rim like 8". I would place a call to Gear -American Tire Distributor to validate recommended tire size for their 20x9 wheels...

A 275 width tire will easily fit on a 8" or 9" wide wheel. Hell, it would fit on a 10" wide wheel, it would just look weird.

The 275 width tires on my last set of wheels for my Formula are 275/40/17 on a 17x9 rim - this was a factory size. It will be fine.

Scott - you are good to go with those stock Pirelli tires no problem. A 275 tire is 10.8" wide so it's perfectly fine on a 9" wide wheel.

The wheels you are looking at are 20x9 with a +18mm offset which will make them kick out about a 1/2" more than your factory wheels. I wouldn't be concerned with it, so as long as you are fine with that you are good to go. It won't affect the ride or anything else noticeably.